Decomposition and heavy metal variations of the typical halophyte litters in coastal marshes of the Yellow River estuary, China

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	Decomposition and heavy metal variations of the typical halophyte litters in coastal marshes of the Yellow River estuary, China
	Z. G. Sun, X. J. Mou and W. L. Sun
刊名	Chemosphere
	2016
卷号	147 页码:163-172
通讯作者	Mou, X. J.
中文摘要	The concentrations of C, Pb, Cr, Cu, Zn, Ni and Mn were determined in decomposing litters of Phragmites australis, Suaeda salsa and Suaeda glauca in three plots of the Yellow River estuary to investigate the variations of metal stocks. Results showed that the decomposition rates significantly differed among species (p < 0.05), in the order of S. glauca (0.002010 d(-1)) > S. salsa (0.000814 d(-1)) > P. australis (0.000766 d(-1)). The concentrations of Cu and Zn in the three litters (particularly S. glauca) generally showed increasing tendency, while those of Pb, Cr, Ni and Mn exhibited different temporal variations. Compared to P. australis and S. salsa, the key mechanisms affecting the variation of metals in S. glauca might be more complex. In most periods, Pb stocks in P. australis, S. salsa and S. glauca, Zn stocks in S. salsa and S. glauca, and Cr, Ni and Mn stocks in P. australis and S. glauca were lower than the initial ones, implying that release exceeded incorporation. Comparatively, Zn stocks in P. australis, Cr, Ni and Mn stocks in S. salsa and in particular Cu stocks in the three litters were generally positive, evidencing incorporation of these metals in most sampling times. The three halophytes were particular efficient in binding Cu and releasing Pb, indicating that the potential eco-toxic risk of Pb exposure might be serious. This study emphasized the strong influences of key biotic (litter types, carbon/metal ratios and activities of microbial organisms) and abiotic variables (salinity, sediment resuspension induced by tidal inundation and passive sorption onto recalcitrant organic fractions) on metal cycling in coastal marshes of the Yellow River estuary. (C) 2015 Elsevier Ltd. All rights reserved.
内容类型	期刊论文
源URL	[http://159.226.123.10/handle/131322/6992]
专题	东北地理与农业生态研究所_湿地生态系统管理学科组_期刊论文
推荐引用方式 GB/T 7714	Z. G. Sun, X. J. Mou and W. L. Sun. Decomposition and heavy metal variations of the typical halophyte litters in coastal marshes of the Yellow River estuary, China[J]. Chemosphere,2016,147:163-172.
APA	Z. G. Sun, X. J. Mou and W. L. Sun.(2016).Decomposition and heavy metal variations of the typical halophyte litters in coastal marshes of the Yellow River estuary, China.Chemosphere,147,163-172.
MLA	Z. G. Sun, X. J. Mou and W. L. Sun."Decomposition and heavy metal variations of the typical halophyte litters in coastal marshes of the Yellow River estuary, China".Chemosphere 147(2016):163-172.